Well you dint say what CPU your using. But as long as its not the higher end and you don't overclock. The only negative effects would be heat. It will be fine. You can run a 24 pin off of 20 pins. Just don't force it in the wrong holes

Well you dint say what CPU your using. But as long as its not the higher end and you don't overclock. The only negative effects would be heat. It will be fine. You can run a 24 pin off of 20 pins. Just don't force it in the wrong holes